Thread: Timing by ear?
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03-12-2007 11:56 AM #12
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Manifold vacuum is the only way to go - ported is ABOVE the throttle plates therefore will show little or no movement without a constant throttle opening - like driving down the road. And then it will only move in relationship to that throttle plate relationship position to full or partial opening.
Ford uses ported vacuum, GM's use manifold vacuum. Usually!!Last edited by Irelands child; 03-12-2007 at 12:02 PM.
Dave 
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And from Kansas! Happy 4th, everyone!!
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